ENGWE-BIKES EP-2Pro - Trouble Shooting

Trouble Shooting
As one or more causes of failure might lead to the failure phenomenon, you should
find out the true cause(s) and then take the appropriate solution(s) to rectify the
problem. In case of doubt, please consult a qualified technician for service, repairs or
maintenance.
Failure Phenomena
Causes of Failure
Solutions
Can not turn on the e-bike
 Battery is off
 The Battery is out of power
 Battery aging or damaged
 Poor contact of display line
 Failure of computer
 Failure of controller
 Turn on the battery
Fully charge the battery
Replace the battery
Reconnect the display
Replace the computer
Replace the controller
Pedal assist doesn’t work
Gear doesn’t work well
Brake doesn’t work well
Display doesn’t light on
 Failure of speed sensor
 Rear derailleur mismatch
 Brake caliper mismatch
 Brake Disc is bent
 Poor contact of display line
 replace speed sensor
 Adjust rear derailleur
 Adjust brake caliper or disc
Reconnect the display line
Can not adjust the speed
Speed is less than
10km/h
Battery’s voltage is too
low
 Throttle governing bar is
damaged
Poor contact of the
controlling line
Spring failure or being
locked
Fully charge the battery
Replace the throttle
governing bar
Replace the spring
e-Bike’s mileage is
obviously inadequate
after fully charged
 Inadequate tire pressure
Failure of charger
The battery cannot be fully
charged
Failure of controller
Battery aging or battery
damaged
 e-Bike has not been well
assembled
Too much upgrade road
Strong wind
Bad road
Overweight
Too many braking times
Temperature is too low
Inflate tire with appropriate
air pressure
Repair the charger
Examine and repair the
controller
Replace the controller
Replace the battery
Re-adjust the e-Bike
 Boost the e-Bike by
manpower
Warm the battery above 0℃
(32℉)
Wheel hub stop running after
switching on the power
The connection of battery is
loosen
Poor contact of controlling
line
 The connection of wheel hub
is loose or damaged
 The protective board of the
battery is broken
Re-connect the battery
Replace the connection
line
Replace the battery’s
protective board with a new
one